An electric cable of copper has just one wire of radius 9 mm. Its resistance is . This single copper wire of cable is replaced by 6 different well insulated copper wires each of radius 3 mm. The total resistance of the cable will now be equal to |
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An electric cable of copper has just one wire of radius 9 mm. Its resistance is . This single copper wire of cable is replaced by 6 different well insulated copper wires each of radius 3 mm. The total resistance of the cable will now be equal to |
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a) |
b) |
c) |
d) |

1 Answer

127 votes

For one wire cable, Resistance, For other wire of cable, Resistance, When six wires each of resistance are connected in parallel, their effective resistance will be |

127 votes

127